1799255
Descripción
Test por 22alexpereyra, actualizado hace más de 1 año
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Creado por 22alexpereyra
hace casi 10 años
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Pregunta 1
Pregunta
The result of fertilization is a zygote; what s the result of meiosis in animals?
Respuesta
-
clones
-
gametes
-
somatic cells
-
diploid cells
-
gametophytes
Pregunta 2
Pregunta
Which of the following is not associated with mitosis?
Respuesta
-
interphase
-
kinetochore
-
cell plate
-
tetrad
-
chromatin
Pregunta 3
Pregunta
In mitosis if each daughter cell has 20 chromosomes how many chromosomes would each parent cell have?
Respuesta
-
5
-
10
-
20
-
40
-
80
Pregunta 4
Pregunta
Which of the following statements are true of metaphase?
Respuesta
-
The duplication of chromosomes occur
-
homologous chromosomes cross over
-
the chromosomes are aligned at the spindle equator
-
the chromosomes move to opposite poles of the cell
-
the nuclear membrane reforms
Pregunta 5
Pregunta
Which of the following statements are false?
Respuesta
-
metastasis is the spread of cancer from one location to another in the body
-
2 types of tumors are benign and malignant
-
cancer cells divide rapidly to produce a mass of cells
-
proto oncogenes are mutated genes
-
tumor suppressor genes make p53 protein that inhibits mitosis
Pregunta 6
Pregunta
The chromosome number of an egg in drosophila melanogastor is 4 what is the chromosome number of a somatic cell?
Respuesta
-
2
-
4
-
8
-
16
-
32
Pregunta 7
Pregunta
Order of cell cycle?
Respuesta
-
DNA Replication, Telophase, Cytokinesis, and 2 identical daughter cells
-
nothing else
Pregunta 8
Pregunta
Which of the following does not produce genetic variation?
Respuesta
-
sexual reproduction
-
crossing over
-
independent assortment
-
random fertilization
-
transcription
Pregunta 9
Pregunta
Circle with 4 Xs in four square, what stage of meiosis?
Respuesta
-
prophase 1
-
metaphase 2
-
prophase 2
-
metaphase 1
-
anaphase 2
Pregunta 10
Pregunta
Centromeres uncouple and chromatids are separated from each other
Respuesta
-
statement true of mitosis
-
statement true of meiosis 1
-
statement true of meiosis 2
-
statement true of mitosis and meiosis 1
-
statement true of mitosis and meiosis 2
Pregunta 11
Pregunta
Which of the following is true?
Respuesta
-
Spindle fibers are made up of centrioles
-
Spindle fibers bring together sister chromatids
-
Spindle fibers attach to chromosomes during anaphase
-
spindle fibers are always present in a cell
-
spindle fibers are made of microtubules
Pregunta 12
Pregunta
A karyotype shows all of the following characteristics of an individual except
Respuesta
-
gender
-
species
-
down syndrome
-
number of chromosomes
-
ploidy number
Pregunta 13
Pregunta
What is the arrow pointing at in this figure (x with arrow)
Respuesta
-
sister chromatid
-
sister chromosome
-
chromosome
-
centromere
-
homologous chromosomes
Pregunta 14
Pregunta
The correct flow of info from gene to phenotypic expression is
Respuesta
-
RNA-DNA-protein-trait
-
trait-protein-DNA-RNA
-
DNA-RNA-protein-trait
-
protein-DNA-RNA-trait
-
trait-RNA-protein-DNA
Pregunta 15
Pregunta
Which enzyme is responsible for joining strands of DNA during replication
Respuesta
-
DNA polymerase
-
DNA ligase
-
topoisomerase
-
primase
-
helicase
Pregunta 16
Pregunta
An insertion of a base pair in a coding region of a gene can result in a _____________ mutation where the reading of codons by the ribosome is altered
Respuesta
-
frameshift
-
wobble
-
base-pair substitution
-
thymine dimer
-
nondisjunction
Pregunta 17
Pregunta
Which component is found in DNA molecules but not in RNA molecules
Respuesta
-
ribose
-
thymine
-
nitrogen containing bases
-
phosphate group
-
guanine
Pregunta 18
Pregunta
All of the following occur during translation except
Respuesta
-
helicase opens the strand for copying
-
an initiator tRNA binds to a ribosomal subunit and the mRNA
-
the initiation complex forms when a large ribosomal subunit joins the initiator tRNA and the mRNA
Pregunta 19
Pregunta
All of the following are post-transcription modifications f eukaryotic mRNA except
Respuesta
-
introns are removed
-
exons may be spliced
-
peptide bonds are formed
Pregunta 20
Pregunta
prokaryotic DNA found outside the main chromosome is known as a
Respuesta
-
PCR
-
cDNA
-
primer
-
DNA chip
-
plasmid
Pregunta 21
Pregunta
Master genes that control the formation of specific body parts are
Respuesta
-
enhancers
-
promoters
-
exons
-
operons
-
homoeotic
Pregunta 22
Pregunta
PCR is used to
Respuesta
-
isolate mutations
-
sequence DNA
-
mass produce a certain DNA fragment
-
attach a tracer to a segment of DNA
-
cut DNA at specific nucleotide sequences
Pregunta 23
Pregunta
Series of 3 nucleotide bases on a tRNA molecule that binds with mRNA
Respuesta
-
anticodon
-
RNA Polymerase
-
rRNA
-
exon
-
operator
Pregunta 24
Pregunta
Enzyme responsible for pairing RNA bases with the DNA template
Respuesta
-
RNA Polymerase
-
anticodon
-
rRNA
-
exon
-
operator
Pregunta 25
Pregunta
In prokaryotic cells this is is the section of DNA that will bind a repressor in order to control gene population
Respuesta
-
operator
-
RNA Polymerase
-
anticodon
-
exon
Pregunta 26
Pregunta
The type of RNA found in ribosomes
Respuesta
-
rRNA
-
RNA Polymerase
-
operator
-
exon
-
anticodon
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